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 A334159 Irregular triangle read by rows: T(n,k) is the number of colorings of the n-hypercube graph using exactly k unlabeled colors, k = 1..2^n. 9
 1, 0, 1, 0, 1, 2, 1, 0, 1, 18, 92, 146, 80, 16, 1, 0, 1, 494, 54583, 1507094, 12630906, 40096740, 58031885, 43419502, 18212138, 4498756, 670366, 60220, 3156, 88, 1, 0, 1, 197546, 5427041958, 17973998149410, 10961517110194516, 1450479305675145412, 56507865332978414188 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,6 LINKS Andrew Howroyd, Table of n, a(n) for n = 0..62 (rows 0..5) Andrew Howroyd, Chromatic Polynomials of Hypercubes Q_0 to Q_5 Eric Weisstein's World of Mathematics, Chromatic Polynomial Eric Weisstein's World of Mathematics, Hypercube Graph EXAMPLE Triangle begins: 0 | 1; 1 | 0, 1; 2 | 0, 1, 2, 1; 3 | 0, 1, 18, 92, 146, 80, 16, 1; 4 | 0, 1, 494, 54583, 1507094, 12630906, 40096740, 58031885, 43419502, 18212138, 4498756, 670366, 60220, 3156, 88, 1; CROSSREFS Cf. A091940, A140986, A158348, A296914, A295176, A334247. Sequence in context: A331278 A266632 A062154 * A326474 A266886 A267546 Adjacent sequences:  A334156 A334157 A334158 * A334160 A334161 A334162 KEYWORD nonn,tabf AUTHOR Andrew Howroyd, Apr 21 2020 STATUS approved

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Last modified April 14 00:42 EDT 2021. Contains 342941 sequences. (Running on oeis4.)