A163365 Row sums of A163357 and A163359.

0, 4, 20, 40, 100, 172, 248, 336, 568, 820, 1100, 1400, 1692, 2012, 2352, 2720, 3632, 4580, 5572, 6600, 7700, 8844, 10024, 11248, 12392, 13588, 14844, 16152, 17484, 18876, 20320, 21824, 25440, 29124, 32884, 36712, 40644, 44652, 48728, 52880

Offset

0,2

Comments

All terms seem to be divisible by 4. Cf. A163477.

Links

Table of n, a(n) for n=0..39.

Hsien-Kuei Hwang, Svante Janson, and Tsung-Hsi Tsai, Identities and periodic oscillations of divide-and-conquer recurrences splitting at half, arXiv:2210.10968 [cs.DS], 2022, pp. 42-43.

Mathematica

nn = 7; s[{n_, k_}, {m_}] := (a[k, n] = m - 1); MapIndexed[s, List @@ HilbertCurve[nn][[1]]]; Total /@ Table[a[n - k, k], {n, 0, nn^2}, {k, n, 0, -1}] (* Michael De Vlieger, Nov 01 2022, after Jean-François Alcover at A163357 *)

Crossrefs

Cf. A163357, A163359.

Sequence in context: A323183 A072977 A341895 * A145194 A164924 A033579

Adjacent sequences: A163362 A163363 A163364 * A163366 A163367 A163368

Keyword

nonn

Author

Antti Karttunen, Jul 29 2009

Status

approved