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 A109672 Entries in 3-dimensional solids related to Prouhet-Tarry problem. 6
 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 1, 1, 1, 3, 1, 1, 1, 1, 2, 2, 1, 2, 1, 1, 3, 3, 1, 3, 6, 3, 3, 3, 1, 1, 2, 1, 1, 5, 5, 1, 2, 5, 2, 1, 1, 1, 1, 2, 5, 2, 1, 5, 5, 1, 1, 2, 1, 1, 3, 3, 3, 6, 3, 1, 3, 3, 1, 1, 4, 6, 4, 1, 4, 12, 12, 4, 6, 12, 6, 4, 4, 1, 1, 3, 3, 1, 1, 7, 12, 7, 1, 3, 12 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,9 COMMENTS Table of slices [n,k] of solids, read by antidiagonals, each slice [n,k] read by rows. Slice [n,0] gives A046816. Slice [0,k] gives A109649. Slice [n,n] gives A109673. LINKS FORMULA Sum of terms in 2D slice [n, k] is 3^(n+k); example : 1+2+1+1+5+5+1+2+5+2+1+127=3^(2+1) for slice [1, 2]. EXAMPLE Slice [0,0]: ...1... Slice [0,1]: ... 1 1 ... .... 1 .... Slice [1,0]: .... 1 .... ... 1 1... Slice [0,2]: .. 1 2 1 ... .... 2 2 ... ..... 1 ..... Slice [1,1]: ... 1 1 ... .. 1 3 1.. ... 1 1 ... Slice [2,0]: ..... 1 ..... .... 2 2 ... .. 1 2 1 ... Slice [0,3]: .. 1 3 3 1 ... ... 3 6 3 .... .... 3 3 ...... ..... 1 ........ Slice [1,2]: ... 1 2 1 ... .. 1 5 5 1 ... ... 2 5 2 ... .... 1 1 ... Slice [2,1]: .... 1 1 ... ... 2 5 2 ... .. 1 5 5 1 ... ... 1 2 1 ... Slice [3,0]: ..... 1 ..... .... 3 3 .... ... 3 6 3 ... .. 1 3 3 1 ... CROSSREFS Sequence in context: A261083 A186713 A156263 * A279362 A214841 A025917 Adjacent sequences:  A109669 A109670 A109671 * A109673 A109674 A109675 KEYWORD nonn,tabf,easy AUTHOR Philippe Deléham, Aug 07 2005 STATUS approved

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Last modified May 29 03:06 EDT 2020. Contains 334696 sequences. (Running on oeis4.)