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A069673 Nonpalindromic triangular numbers whose digit reversal is also a triangular number (possibly with fewer digits). 8

%I #16 May 21 2022 19:41:58

%S 10,120,153,190,300,351,630,820,17578,87571,156520,180300,185745,

%T 547581,557040,678030,1461195,1851850,5911641,6056940,12145056,

%U 12517506,16678200,56440000,60571521,65054121,157433640,188267310,304119453,354911403,1261250200

%N Nonpalindromic triangular numbers whose digit reversal is also a triangular number (possibly with fewer digits).

%H Giovanni Resta, <a href="/A069673/b069673.txt">Table of n, a(n) for n = 1..123</a> (terms < 2*10^24)

%Y See A066528 for a different version.

%Y Cf. A066703, A179889.

%Y Cf. A003098, A061455, A066569.

%K nonn,base

%O 1,1

%A _Amarnath Murthy_, Apr 06 2002

%E More terms from _Jason Earls_, Jun 07 2002

%E a(27)-a(31) from _Giovanni Resta_, Jun 20 2015

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)