A357415 - OEIS

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A357415

Number of nonempty subsets of {1..n} whose elements have an odd root mean square.

1, 1, 2, 2, 3, 3, 6, 6, 7, 9, 16, 26, 41, 85, 142, 254, 461, 825, 1454, 2506, 4535, 7987, 14352, 26178, 47861, 87945, 162486, 304864, 565217, 1064529, 1992628, 3742934, 7034489, 13214869, 24924676, 46926388, 88812537, 167903969, 318619708, 604909434, 1150800393

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OFFSET

1,3

LINKS

Table of n, a(n) for n=1..41.

FORMULA

a(n) = A339454(n) - A357416(n).

EXAMPLE

a(10) = 9 subsets: {1}, {3}, {5}, {7}, {9}, {1, 7}, {1, 5, 7}, {2, 3, 6, 8, 9, 10} and {2, 3, 6, 7, 8, 9, 10}.

CROSSREFS

Cf. A339454, A357355, A357411, A357413, A357416.

Sequence in context: A373612 A147795 A258186 * A038716 A168659 A035642