%I A077222
%S A077222 1,8,17,32,49,72,9,16,33,48,73,96,25,24,57,64,105,120,169,56,65,104,121,
%T A077222 168,193,248,41,40,81,88,137,152,209,80,89,136,153,208,233,128,97,192,
%U A077222 249,112,113,176,185,256,273,352,177,184,257,272,353,376,465,160
%N A077222 a(1) = 1 and then alternately the smallest even and odd numbers not occurring 
               earlier such that the sum of two successive terms is a square.
%Y A077222 Cf. A077221.
%Y A077222 Sequence in context: A056121 A028884 A099358 this_sequence A077221 A106648 
               A076980
%Y A077222 Adjacent sequences: A077219 A077220 A077221 this_sequence A077223 A077224 
               A077225
%K A077222 nonn
%O A077222 0,2
%A A077222 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 03 2002
%E A077222 Corrected and extended by John W. Layman (layman(AT)math.vt.edu), Jan 
               12 2005