A070713 - OEIS

%I #4 Jun 10 2024 21:15:03

%S 1,4,9,22,88,144,414,441,466,646,664,889,898,988,1111,1177,1224,1242,

%T 1339,1393,1422,1717,1771,1933,2124,2142,2214,2241,2266,2338,2383,

%U 2412,2421,2626,2662,2833,3139,3193,3238,3283,3319,3328,3355,3382,3391,3535

%N Integers whose sum of digits as well as product of digits is a nonzero square.

%e 3931 is a member of this sequence as 3+9+3+1=16=4^2 and 3*9*3*1=81=9^2.

%Y Cf. A028839.

%K nonn,base

%O 1,2

%A John E. Lenz (jel5010(AT)yahoo.com), May 13 2002