A385609 - OEIS

A385609

Partial sums of A090740.

1, 4, 5, 9, 10, 13, 14, 19, 20, 23, 24, 28, 29, 32, 33, 39, 40, 43, 44, 48, 49, 52, 53, 58, 59, 62, 63, 67, 68, 71, 72, 79, 80, 83, 84, 88, 89, 92, 93, 98, 99, 102, 103, 107, 108, 111, 112, 118, 119, 122, 123, 127, 128, 131, 132, 137, 138, 141, 142, 146, 147, 150, 151

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OFFSET

1,2

COMMENTS

Prepended with 0, a trisection of A385608.

LINKS

Paolo Xausa, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = Sum_{k=1..n} A090740(k).

a(n) = 2*n + floor(n/2) - A000120(n).

a(n) = A385608(n*3).

MATHEMATICA