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%I A342281 #10 Mar 24 2021 15:35:58
%S A342281 1,4,7,9,12,15,18,21,24,26,29,32,35,38,41,43,46,49,52,55,57,60,63,66,
%T A342281 69,72,74,77,80,83,86,89,91,94,97,100,103,106,108,111,114,117,120,123,
%U A342281 125,128,131,134,137,140,142,145,148,151,154,156,159,162,165,168
%N A342281 A bisection of A001951: a(n) = A001951(2*n+1).
%H A342281 N. J. A. Sloane, <a href="/A115004/a115004.txt">Families of Essentially Identical Sequences</a>, Mar 24 2021 (Includes this sequence)
%o A342281 (Python)
%o A342281 from sympy import integer_nthroot
%o A342281 def A342281(n): return integer_nthroot(8*n*(n+1)+2,2)[0] # _Chai Wah Wu_, Mar 16 2021
%Y A342281 Cf. A001951, A022842.
%K A342281 nonn
%O A342281 0,2
%A A342281 _N. J. A. Sloane_, Mar 16 2021
%E A342281 More terms from _Alois P. Heinz_, Mar 16 2021

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