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A202269 Right-truncatable triangular numbers: every prefix is triangular number. 1

%I #10 Mar 30 2012 19:00:28

%S 1,3,6,10,15,36,66,105,153,666

%N Right-truncatable triangular numbers: every prefix is triangular number.

%C This sequence is finite with 10 terms.

%Y Cf. A000217 (triangular numbers).

%K nonn,base,fini,full

%O 1,2

%A _Jaroslav Krizek_, Dec 25 2011

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Last modified March 28 11:46 EDT 2024. Contains 371241 sequences. (Running on oeis4.)