A345043 a(n) = A344998(n) - A344999(n).

1, 2, 6, 1, 20, 0, 42, 0, 10, 22, 110, -16, 156, 60, 96, -1, 272, -15, 342, -12, 220, 184, 506, -12, 76, 270, 14, 0, 812, -492, 930, -2, 612, 490, 792, -38, 1332, 624, 880, -10, 1640, -660, 1806, 48, 132, 940, 2162, 56, 246, 63, 1560, 84, 2756, -36, 2128, -8, 1972, 1534, 3422, -1248, 3660, 1764, 330, -3, 3036, -996, 4422

Offset: 1

Author

Antti Karttunen, Jun 06 2021

Keywords

• sign

Comments

Each term a(n) seems to be a multiple of A033879(n). Factor (quotient) is negative at least for 16, 32, 48, 64, 72, 80, 96, 112, 128, 144, 160, 176, 192, 200, 208, 216, 224, 240, 243, 256, 272, 288, 304, 320, 324, 336, 352, 368, 384, 392, 400, 416, 432, 448, 464, 480, 486, ...

Crossrefs

Cf. A033879, A344998, A344999, A345003 (positions of zeros).

Formula

a(n) = A344998(n) - A344999(n).