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%I #11 Nov 16 2024 16:58:17
%S 1,2,3,4,5,36,72,125,136,900,4454,8021,27223,33905,73222,127536,
%T 146353,180177,234668,273241
%N Fixed points of permutations A252022 and A252023.
%o (Haskell)
%o a252079 n = a252079_list !! (n-1)
%o a252079_list = [x | x <- [1..], a252022 x == x]
%o (Python)
%o A252079_list, l, s, b = [1], [1], 2, set()
%o for n in range(2, 10**5):
%o i = s
%o while True:
%o if i not in b:
%o li = [int(d) for d in str(i)[::-1]]
%o for x, y in zip(li, l):
%o if x+y > 9:
%o break
%o else:
%o l = li
%o b.add(i)
%o if i == n:
%o A252079_list.append(i)
%o while s in b:
%o b.remove(s)
%o s += 1
%o break
%o i += 1 # _Chai Wah Wu_, Dec 14 2014
%Y Cf. A252022, A252023, A252078.
%K nonn,more
%O 1,2
%A _Reinhard Zumkeller_, Dec 13 2014
%E a(16)-a(20) from _Chai Wah Wu_, Dec 14 2014