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A056232
Form an array with 3 rows: row 1 begins with 1; all rows are increasing; each entry is sum of 2 entries above it; each number appears at most once; smallest unused number is appended to first row if possible. Sequence gives row 2.
8
3, 6, 11, 15, 18, 22, 25, 27, 30, 35, 39, 41, 44, 51, 59, 63, 66, 70, 73, 75, 81, 88, 91, 94, 97, 99, 103, 107, 109, 111, 114, 118, 121, 123, 126, 131, 135, 137, 140, 147, 153, 155, 157, 161, 165, 167, 170, 173, 176, 181, 188, 194, 198, 201, 203
OFFSET
1,1
LINKS
EXAMPLE
Array begins
1 2 4 7 8 10 12 ...
.3 6 11 15 18 ...
. 9 17 26 33 ...
PROG
(Haskell) cf. A056231.
CROSSREFS
KEYWORD
nonn,nice,easy
AUTHOR
N. J. A. Sloane, E. M. Rains, Aug 22 2000
STATUS
approved