A278420 a(n) = (A278399(n)^2 + A278400(n)^2)/2.

1, 1, 1, 2, 2, 5, 4, 9, 10, 20, 18, 32, 45, 58, 82, 101, 148, 178, 274, 306, 452, 512, 785, 872, 1258, 1450, 2061, 2304, 3274, 3796, 5108, 6056, 7954, 9376, 12200, 14733, 18500, 22608, 28004, 34354, 41905, 51752, 62122, 77090, 91764, 114640, 134560, 167690

Offset

0,4

Links

Vaclav Kotesovec, Table of n, a(n) for n = 0..10000

Formula

a(n) = A292042(n)^2 + A292043(n)^2. - Vaclav Kotesovec, Sep 08 2017

Mathematica

Abs[(QPochhammer[I, x] + O[x]^60)[[3]]]^2 / 2

Crossrefs

Cf. A278399, A278400, A292042, A292043.

Sequence in context: A091769 A276519 A034402 * A292385 A332895 A095057

Adjacent sequences: A278417 A278418 A278419 * A278421 A278422 A278423

Keyword

nonn

Author

Vladimir Reshetnikov, Nov 21 2016

Status

approved