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A083487 Triangle T(l,c) giving number of edges (of unit length) in a c X l grid. +0
3
4, 7, 12, 10, 17, 24, 13, 22, 31, 40, 16, 27, 38, 49, 60, 19, 32, 45, 58, 71, 84, 22, 37, 52, 67, 82, 97, 112, 25, 42, 59, 76, 93, 110, 127, 144, 28, 47, 66, 85, 104, 123, 142, 161, 180, 31, 52, 73, 94, 115, 136, 157, 178, 199, 220, 34, 57, 80, 103, 126, 149, 172, 195 (list; table; graph; listen)
OFFSET

1,1

FORMULA

T(l, c) = 2*l*c + l + c; c <= l

CROSSREFS

Cf. A082652, A083003.

Sequence in context: A128836 A061956 A072732 this_sequence A092572 A092574 A058271

Adjacent sequences: A083484 A083485 A083486 this_sequence A083488 A083489 A083490

KEYWORD

nonn,tabl

AUTHOR

Artemario Tadeu Medeiros da Silva (artemario(AT)uol.com.br), Jun 09 2003

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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