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%I #8 Jul 10 2015 22:48:20
%S 1,3,9,26,62,127,233,393,621,932,1342,1869,2533,3355,4357,5562,6994,
%T 8678,10641,12911,15518,18493,21868,25676,29951,34728,40044,45937,
%U 52446,59611,67474,76078,85467,95686,106781,118799,131788,145797
%N a()=A037260 and its first [ A037261 ], 2nd [ A037262 ] and 3rd [ A037263 ] differences together include every number at most once and are monotonic and minimal.
%C 5 is the only number less than 100 not used in any of the 4 sequences - Larry Reeves (larryr(AT)acm.org), Sep 25 2000
%e After 1 3 9 26 62
%e ------ 2 6 17 36
%e ------- 4 11 19
%e -------- 7 8
%e the next free number is 10 which we CAN add to 4th row.
%Y A037260-A037263 are 4-rowed analog of A037257-A037259. See A005228, A030124 for 2-rowed version.
%K nonn,easy
%O 0,2
%A _N. J. A. Sloane_
%E More terms from Larry Reeves (larryr(AT)acm.org), Sep 25 2000
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