1,2

Table of n, a(n) for n=1..35.

5967 is in the sequence because (1) it is a decagonal number and (2) the sum of its digits 5+9+6+7=27 is also a decagonal number.

Cf. A001107.

Sequence in context: A079914 A051790 A220638 * A117797 A301311 A291530

Adjacent sequences: A119544 A119545 A119546 * A119548 A119549 A119550

base,nonn

Luc Stevens (lms022(AT)yahoo.com), May 28 2006

approved